Claude
Anthropic
AI assistant from Anthropic for writing, analysis and coding, available on a free plan and paid Pro and Max plans.
Text & writingCoding Check the terms
QuillBot
AI paraphrasing and writing tool with a free plan limited to 125 words per paraphrase and an annually billed Premium plan.
| Plan | Price | Notes |
|---|---|---|
| Free | $0 per month | Paraphrasing up to 125 words in 2 modes, basic grammar fixes, summaries up to 1,200 words, 10 MB Flow storage; no credit card required |
| Premium | $8.33/month, billed annually | Unlimited paraphrasing with 9 modes, plagiarism checker 25,000 words per month, unlimited AI detector, summaries up to 6,000 words; 3-day money-back guarantee |
| Team | See official pricing page | Discount for 5 or more members with a single invoice |
Paraphrasing up to 125 words in 2 modes, basic grammar fixes, summaries up to 1,200 words and 10 MB of storage.
The page does not state commercial-use terms. It also shows a $5.00 figure next to the Premium price without explaining it.
Anthropic
AI assistant from Anthropic for writing, analysis and coding, available on a free plan and paid Pro and Max plans.
Google AI assistant with a free tier and paid Google AI plans that add usage, storage and video generation.
Grammarly
AI writing assistant with a free plan of 100 AI prompts per month and a Pro plan with 2,000 prompts per member per month.